Display device for musical instrument

Abstract

Display device for a musical instrument, comprising: a touch panel comprising lights arranged in spaces separated by several ribs and a film provided above the lights, and a switch that switches a visual appearance of the touch panel between a first appearance mode and a second appearance mode, wherein the touch panel is operative in both the first appearance mode and the second appearance mode, such that in a case where the touch panel is in the first appearance mode, the touch panel has a first visual appearance, and in a case where the touch panel is in the second appearance mode, the touch panel has a second visual appearance that is different from the first visual appearance, wherein, of the first visual appearance of the touch panel in the first appearance mode and the second visual appearance of the touch panel in the second appearance mode, the second visual appearance of the touch panel in the second appearance mode is more similar to a visual appearance of a portion of the musical instrument arranged adjacent to the touch panel than the first visual appearance of the touch panel in the first appearance mode, the touch panel displays information separated by the ribs, which can be displayed to an information presentation subject in the first appearance mode by switching on the light of the lamps, and the visual appearance of the touch panel takes on the second visual appearance when the lights are not lit.

Description

PRIOR ARTTechnical FieldThe present disclosure relates to a display device for a musical instrument that displays setting information of the musical instrument.Description of Related ArtAn electronic musical instrument such as an electronic organ has an operation panel in which operation keys, etc. are arranged. The operation panel includes, for example, the operation keys and switches, and can accept various operations with respect to the electronic musical instrument. A player can use various functions included in the electronic musical instrument by operating the operation panel.Further, an operation panel of an electronic device, etc. may be of the touch panel type, and operation buttons and contents of the current settings are displayed on a touch panel. JP 2006-146701 A discloses an operation input device included in a portable music player. This portable music player includes a touch panel operation unit, whereby an operation with respect to the portable music player can be accepted.SUMMARYAs described above, the electronic musical instrument such as an electronic organ has an operation panel, thereby being capable of accepting an operation performed by a player and performing various functions. For example, the electronic organ has various functions that are not present in an acoustic piano. Meanwhile, there are many players who interest the traditional design or appearance of a musical instrument such as an acoustic piano. If both excellent functions of an electronic musical instrument and a visually pleasing appearance of a traditional musical instrument can be provided, a player is expected to feel satisfactory and enjoy a function of the electronic musical instrument.An object of the present disclosure is to provide a display device for a musical instrument that can provide both functions of an electronic musical instrument and a visually pleasing appearance of a traditional musical instrument.A display device for a musical instrument according to an aspect of the present disclosure includes a touch panel located adjacent to an external member that makes up the appearance of the musical instrument, and a changeover switch that switches the appearance of the touch panel between a first mode and a second mode in which the appearance of the touch panel is similar to the appearance of the external member than in the first mode.Other features, elements, characteristics and advantages of the present disclosure will become more apparent from the following description of preferred embodiments of the present disclosure with reference to the accompanying drawings.BRIEF DESCRIPTION OF THE DRAWINGFIG. 1 is a diagram showing the appearance of an electronic musical instrument; FIG. 2 is a diagram showing the appearance of the electronic musical instrument; FIG. 3 is a cross-sectional side view of a touch panel; FIG. 4 is a block diagram showing the configuration of the electronic musical instrument; FIG. 5 is a flowchart showing display switching according to a first embodiment; FIG. 6 is a flowchart showing display switching according to the first embodiment; FIG. 7 is a flowchart showing display switching according to the first embodiment; FIG. 8 is a flowchart showing display switching according to the first embodiment; FIG. 9 is a diagram showing a display state of a display device for a musical instrument according to a second embodiment; FIG. 10 is a diagram showing the appearance of an electronic musical instrument according to a third embodiment; FIG. 11 is a diagram showing the appearance of an electronic musical instrument according to a fourth embodiment; FIG. 12 is a flowchart showing opening / closing of the cover according to the third and fourth embodiments; FIG. 13 is a flowchart showing opening / closing of the cover according to the third and fourth embodiments; FIG. 14 is a flowchart showing opening / closing of the cover according to the third and fourth embodiments; and FIG. 15 is a flowchart showing opening / closing of the cover according to the third and fourth embodiments.DETAILED DESCRIPTIONFirst Embodiment(1) Configuration of Electronic Musical InstrumentA display device for a musical instrument according to a first embodiment of the present disclosure will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing the appearance of an electronic musical instrument 1 according to the embodiment. The electronic musical instrument 1 is an electronic organ in the present embodiment. The electronic musical instrument 1 includes a keyboard 10 and a touch panel 20, and the appearance of the electronic musical instrument 1 is made up of an outer member 5 near the keyboard 10 and the touch panel 20. Alternatively, an element in a bright color such as white may be used for the outer member 5. Further, the outer member 5 is, for example, a member having a wood pattern. The touch panel 20 is disposed to be adjacent to the outer member 5.The touch panel 20 displays operation keys for performing various setting operations with respect to the electronic musical instrument 1. The touch panel 20 also displays information such as a work function or a work mode in the electronic musical instrument 1. The touch panel 20 is positioned laterally of the keyboard 10. That is, the touch panel 20 is located at a position corresponding to a side jaw (or "Hyoshigi" in Japanese) in the case of an acoustic piano. In FIG. 1, the touch panel 20 displays various information, and a player or a person in the vicinity of the electronic musical instrument 1 may input an operation with respect to the electronic musical instrument 1 or check a working state of the electronic musical instrument 1, etc. The state shown in FIG. 1, in which the touch panel 20 lights and displays various information, is referred to as a first mode.FIG. 2 is a diagram showing the appearance of the electronic musical instrument 1 in which the touch panel 20 does not display the information. In the touch panel 20, backlight does not illuminate, and the appearance of the touch panel 20 is changed to the appearance similar to the exterior member 5. That is, the information is not displayed in the touch panel 20, and the touch panel 20 seems to be similar to a side jaw of an acoustic piano. The state shown in FIG. 2 in which the touch panel 20 is not lit and does not display the information is referred to as a second mode. The appearance of the touch panel 20 in the second mode is similar to the appearance of the exterior member 5 as compared to the appearance of the touch panel 20 in the first mode.The following examples are mentioned as a case where the appearance of the touch panel 20 in the second mode is similar to the appearance of the exterior member 5 as compared to the appearance of the touch panel 20 in the first mode. In an example, as shown in FIGS. 1 and 2, the information is displayed in the first mode, and the information is not displayed in the second mode. Alternatively, the size of a field for displaying the information for the second mode may be reduced as compared with the first mode. In another example, the degree to which the color of the touch panel 20 fuses with the color of the exterior member 5 in the second mode is higher than the degree to which the color of the touch panel 20 fuses with the color of the exterior member 5 in the first mode. In other words, the degree of correlation between the color of the touch panel 20 and the color of the exterior member 5 in the second mode is higher than the degree of correlation between the color of the touch panel 20 and the color of the exterior member 5 in the first mode. Further, in another example, the degree to which the pattern of the touch panel 20 fuses with the pattern of the exterior member 5 in the second mode is higher than the degree to which the pattern of the touch panel 20 fuses with the pattern of the exterior member 5 in the first mode. In other words, the degree of correlation between the pattern of the touch panel 20 and the pattern of the exterior member 5 in the second mode is higher than the degree of correlation between the pattern of the touch panel 20 and the pattern of the exterior member 5 in the first mode. For example, it is assumed that the touch panel 20 is displayed in the second mode to have a wood pattern in a case where the outer member 5 has a wood pattern.(2) Configuration of Touch PanelFIG. 3 is a cross-sectional side view of the touch panel 20. As shown in FIG. 3, in the touch panel 20, a film 22 is located over an LCD glass laminate 21, for example, the film 22 is a black film, and open portions 22A are formed in the film 22 by cutting characters, symbols, etc. In a lower portion of the LCD glass laminate 21, a plurality of ribs 23 are provided, and LEDs 24 for backlight are disposed in spaces separated by the ribs 23.Since the touch panel 20 has such a configuration, it can display characters and symbols formed by the open portions 22A as information by turning on the light of the LEDs 24. Further, the characters, symbols, etc. formed by the open portions 22A are separated by the ribs 23. Therefore, when a part of the LEDs 24 lights up, the light from the LED 24 does not exit to the characters, symbols, etc. formed by adjacent open portions 22A, so that only the character or symbol corresponding to the lighting LED 24 can be clearly displayed.The film 22 is a black film as described above. The film 22 may also be dark brown or have a wood pattern. Alternatively, the film 22 may have a light color such as white. The film 22 preferably has a color similar to the outer member 5. Alternatively, the film 22 preferably has a pattern similar to the outer member 5. When the touch panel 20 is not illuminated because the LED 24 is not illuminated, the appearance of the sheet 22 becomes the appearance of the touch panel 20.(3) Functional Configuration of Electronic Musical InstrumentNext, the functional configuration of the electronic musical instrument 1 will be described. FIG. 4 is a block diagram showing the functional configuration of the electronic musical instrument 1. The electronic musical instrument 1 includes the keyboard 10, the touch panel 20, a performance input unit 101, a tone generator 104, a sound system 105, a CPU (Central Processing Unit) 106, a RAM (Random Access Memory) 107, a ROM (Read Only Memory) 108, and a timer 109. The touch panel 20 includes an operation input unit 102 and a display 103.The performance input unit 101 receives music performance operation information from the keyboard 10. The music performance data is MIDI (Musical Instrument Digital Interface) data or audio data. The operation input unit 102 receives operations for setting a music performance sound, selecting an automatic accompaniment sound, setting the volume of an automatic accompaniment sound, reproducing a Musikdarbietungsdemonstrationsklangs turning on and off a power supply, and various settings. The display 103 displays, for example, various information related to music performance or settings. The touch panel 20 is composed of the operation input unit 102 and the display 103. The performance input unit 101, the operation input unit 102, and the display 103 are connected to a bus 120.The RAM 107 is composed of, for example, a volatile memory and is used as a work area when the CPU 106 executes a program and temporarily stores various data. The ROM 108 is composed of, for example, a nonvolatile memory, and stores a computer program such as a switching program P 1 and various data. A flash memory such as an EEPROM is used as the ROM 108. The CPU 106 executes the switching program P1 stored in the ROM 108 while using the RAM 107 as a work area, thereby performing a display switching process described below. The CPU 106, RAM 107 and ROM 108 are connected to the bus 120. The CPU 106, RAM 107 and ROM 108 constitute a changeover switch 110. The touch panel 20 and the changeover switch 110 constitute the display device 100 for a musical instrument.The tone generator 104 is connected to the bus 120 and the sound system 105 is connected to the tone generator 104. The sound generator 104 generates a musical sound signal based on the music performance data received from the performance input unit 101. The sound system 105 includes a digital-to-analog (D / A) conversion circuit, an amplifier, and a speaker. The sound system 105 converts the musical sound signal supplied from the sound generator 104 into an analog sound signal, and generates a sound based on the analog sound signal. Thus, the musical sound signal is reproduced. The timer 109 is connected to the bus 120 and measures an elapsed time in response to an instruction provided from the changeover switch 110.(4) Display Switching MethodFIGS. 5 to 8 are flowcharts showing display switches according to the first embodiment. The display switching process of Figs. 5 to 8 is carried out by the changeover switch 110 shown in Fig. 4. First, reference is made to FIG. 5. In step S 101, the changeover switch 110 determines whether an operation of turning on the power supply is detected in the operation input unit 102. In a case where the operation of turning on the power supply is detected, the changeover switch 110 turns on the light of the touch panel 20 (step S 102). Then, the changeover switch 110 starts the timer 109 (step S 103). Thus, the timer 109 starts measuring an elapsed time period for maintaining a lighting state of the touch panel 20.In a case where the operation of turning on the power supply is not detected in step S 101, the changeover switch 110 determines whether an operation of turning off the power supply has been detected in the operation input unit 102 in step S 104. In a case where the operation of turning off the power supply has been detected, the changeover switch 110 turns off the light of the touch panel 20 (step S 105). Then, the changeover switch 110 stops the timer 109 (step S 106). Further, the changeover switch 110 stops the work in execution (step S 107). For example, the reproduction of demonstration of music performance or reproduction of automatic accompaniment sound is stopped.In a case where the operation of turning off the power supply is not detected in step S 104, the changeover switch 110 determines whether the timer 109 is active and whether the elapsed time measured by the timer 109 has exceeded a predetermined time (step S 108). In a case where the predetermined period of time has elapsed, the changeover switch 110 turns off the light of the touch panel 20 (step S 109). Then, the changeover switch 110 stops the timer 109 (step S 110). In step S 109, in a case where the timer 109 is not active or in a case where the timer is active but the predetermined period of time has not elapsed, the process proceeds to step S 201 of FIG. 6. Further, after step S 103, step S 107, or step S 110, the process returns to step S 101.Next, reference is made to FIG. 6. In step S 201, the changeover switch 110 determines whether a start of execution of a predetermined function has been detected. The predetermined function is a function to be executed when the touch panel 20 lights at all times. For example, the reproduction of the demonstration of music performance, recording, etc. is set as the predetermined function. In a case where a start of execution of a predetermined function has been detected, the changeover switch 110 stops the timer 109 (step S 202). Then, the changeover switch 110 turns on the light of the touch panel 20 (step S 203). Further, the changeover switch 110 sets an execution flag indicating the execution of a predetermined function in an ON state (step S 204).In step S 201, in a case where a start of execution of a predetermined function has not been detected, the changeover switch 110 determines whether an end of execution of a predetermined function has been detected (step S 205). In a case where an end of execution of a predetermined function has been detected, the changeover switch 110 starts the timer 109 (step S 206). That is, since the execution of a predetermined function has been ended, the timer 109 is started so that the touch panel 20 does not illuminate after a predetermined period of time has elapsed from the end of the execution of the predetermined function. Further, the changeover switch 110 sets the execution flag indicating the execution of a predetermined function in an OFF state (step S 207). In a case where no end of execution of a predetermined function has been detected in step S 205, the process proceeds to step S 301 of FIG. 7. Further, after step S 204 or step S 207, the process returns to step S 101.Next, reference is made to FIG. 7. In step S 301, the switcher 110 determines whether a panel operation with respect to the touch panel 20 has been detected. That is, the changeover switch 110 determines whether the input of an operation with respect to the operation input unit 102 has been detected. In a case where a panel operation is detected, the changeover switch 110 determines whether an execution flag of a predetermined function is in an OFF state (step S 302). In a case where the execution flag is in the OFF state, the switcher 110 determines whether the touch panel 20 is not lit (step S 303). In a case where the touch panel 20 is not illuminated, the changeover switch 110 turns on the light of the touch panel 20 (step S 304). That is, in a case where panel operation is performed with the execution flag in the OFF state, the light of the touch panel 20 is turned on when the touch panel 20 is not illuminated. Then, the changeover switch 110 starts the timer 109 (step S305). Thus, the measurement of the predetermined period is started from a time point when the light of the touch panel 20 is turned on. In a case where it is determined that the touch panel 20 is lighting in step S 303, the changeover switch 110 resets the timer 109 (step S 306). That is, although the touch panel 20 lights up, the measurement of a predetermined period is reset because a panel operation is newly performed (the measurement starts at 0).After the measurement of the predetermined period of time is started in step S 305 and step S 306, the process performed by the changeover switch 110 proceeds to step S 401 of FIG. 8. In a case where no panel operation has been detected in step S 301, the process proceeds to step S 401 of FIG. 8. Further, the CPU 106 executes the process of step SA 1 to step SA 3 after step S 305 and step S 306 executed by the changeover switch 110. First, the CPU 106 detects an operation position with respect to the touch panel 20 (step SA 1). Subsequently, the CPU 106 specifies a function or setting corresponding to the operation position (step SA 2). In a case where the specified function is executable, the CPU 106 executes the specified function. Alternatively, in a case where the specified setting is adjustable, the CPU 106 performs the specified setting (step SA 3).Next, reference is made to FIG. 8. In step S 401, the switcher 110 determines whether a music performance sound is output. The changeover switch 110 determines the output state of a music performance sound based on whether the performance input unit 101 receives music performance operation information. In a case where a music performance sound is output, the changeover switch 110 determines whether an execution flag of a predetermined function is in an OFF state (step S 402). In a case where the execution flag is in the OFF state, the switcher 110 determines whether the touch panel 20 is lighting (step S 403). In a case where the touch panel 20 is lit, the changeover switch 110 turns off the light of the touch panel 20 (step S 404). That is, in a case where a music performance sound is output while the execution flag is in the OFF state, the light of the touch panel 20 is turned off. Then, the changeover switch 110 stops the timer 109 (step S405). After step S 405 the process returns to step S 101 of FIG. 5. In a case where no music performance sound is output in step S 401, in a case where the execution flag is in an ON state in step S 402, or in a case where it is determined in step S 403 that the touch panel 20 is not lit, the process returns to step S 101 of FIG. 5.(5) Effects of the First EmbodimentAs described above, the display device 100 for a musical instrument according to the present embodiment includes the touch panel 20 disposed to be adjacent to the outer member 5 constituting the appearance of the electronic musical instrument 1. Then, the changeover switch 110 included in the display device 100 for a musical instrument switches the appearance of the touch panel 20 between the first mode and the second mode in which the appearance of the touch panel 20 is similar to that of the outer member 5 than in the first mode. Thus, in the second mode, the touch panel 20 has a visually pleasing appearance in which the touch panel 20 fuses to the exterior member 5 of the electronic musical instrument 1. The player can operate the electronic musical instrument 1 while having a feeling similar to the feeling of playing an acoustic piano.Further, as shown in steps S 301 to step S 306 of FIG. 7, the changeover switch 110 switches the appearance of the touch panel 20 from the second mode to the first mode when an operation with respect to the touch panel 20 is detected. Since the touch panel 20 lights up when the player performs an operation on the touch panel 20, the player can easily perform an operation on the touch panel 20.Further, as shown in steps S 201 to step S 207 of FIG. 6, the appearance of the touch panel 20 is switched from the second mode to the first mode during execution of a certain function in the electronic musical instrument 1. The touch panel 20 lights up during execution of a certain function in which information needs to be displayed on the touch panel 20. The player can check the execution status of the specific function on the touch panel 20.Further, as shown in steps S 108 to step S 110 of FIG. 5, in a case where an operation performed on the touch panel 20 has not been detected in a predetermined period of time or in a case where the predetermined period of time has elapsed from the end of execution of a certain function, the appearance of the touch panel 20 is switched from the first mode to the second mode. When the player does not need to perform an operation on the touch panel 20 or when a certain function is not performed, the appearance of the touch panel 20 becomes similar to the outer member 5 of the electronic musical instrument 1. The player can operate the electronic musical instrument 1 with a visually pleasing appearance while having a feeling similar to the feeling of playing an acoustic piano.Further, as shown in steps S 401 to step S 405 of FIG. 8, the changeover switch 110 switches the appearance of the touch panel 20 from the first mode to the second mode during the output of a music performance sound in the electronic musical instrument 1. Since the appearance of the touch panel 20 is similar to the appearance of the outer member 5 during music performance, the player can enjoy music performance while having a feeling similar to the feeling of playing an acoustic piano.Further, the changeover switch 110 turns on the light of the touch panel 20 in the first mode and turns off the light of the touch panel 20 in the second mode. In this way, it is possible to change the appearance of the touch panel 20 to be similar to the exterior member 5 by changing the lighting mode of the touch panel 20.Further, in the first mode, the touch panel 20 of the electronic musical instrument 1 displays the information to be visible to an information presentation subject. Here, the information presentation subject is the player who plays the electronic musical instrument 1 or an audience listening to a music performance sound of the electronic musical instrument 1. In this way, the touch panel 20 presents the information in the first mode to the information presentation subject, and is switched to have the appearance similar to the outer member 5 in the second mode.Second Embodiment(1) Switch display by polarizerNext, a display device 100 for a musical instrument according to a second embodiment of the present disclosure will be described. In the display device 100 for a musical instrument according to the second embodiment, the touch panel 20 includes a polarizer. The configuration of the rest of the display device 100 for a musical instrument is similar to that of the first embodiment.FIG. 9 is a diagram showing the state of the appearance of the touch panel 20 according to the second embodiment. The touch panel 20 according to the second embodiment includes the polarizer, and the state of the appearance changes depending on a position of a viewer who views the touch panel 20. In FIG. 9, "black" indicates that the touch panel 20 appears to the viewer close to the appearance of the exterior member 5, i.e., the touch panel 20 is in the second mode. In FIG. 9, "characters" indicate that the touch panel 20 displays information visible to the viewer, i.e., the touch panel 20 is in the first mode.In the example of FIG. 9, in a case where the player sits in a left position and an audience stands near the touch panel 20, the state of the appearance of the touch panel 20 is similar to that of the first embodiment. That is, the appearance of the touch panel 20 is in the second mode for the viewer when the power supply is turned off after a predetermined time has elapsed since the power supply was turned on, during music performance, or after a predetermined time has elapsed since panel operation was performed. Further, the appearance of the touch panel 20 to the viewer is in the first mode when the power supply turn-on is detected, when a panel operation is detected, or in a case where a predetermined period of time has not elapsed since a panel operation was performed.In contrast, in a case where the player sits near the center or at a right position and an audience stands near the center or near the right side of the electronic musical instrument 1, the appearance of the touch panel 20 is for the viewer in the second mode due to the action of the polarizer. The viewer can play the electronic musical instrument 1 or hear and watch a music performance of the electronic musical instrument 1 while having a feeling similar to the feeling of observing an acoustic piano.(2) Effects of the Second EmbodimentAs described above, in the display device 100 for a musical instrument of the second embodiment, the touch panel 20 includes the polarizer, so that the touch panel 20 can be in the second mode at all times depending on the position of the viewer. In the example shown in FIG. 9, during a period in which the player gives a music performance while sitting near the center or at the right position, the touch panel 20 may be in the second mode at all times in the display device 100 for a musical instrument. Further, in the example shown in FIG. 9, during a period in which the audience is near the center or near the right side of the electronic musical instrument 1, the touch panel 20 may be at all times in the second mode in the display device 100 for a musical instrument.Third and Fourth Embodiments(1) Configuration of Electronic Musical InstrumentFIG. 10 is a diagram showing the appearance of an electronic musical instrument 1A of a third embodiment. FIG. 11 is a diagram showing the appearance of an electronic musical instrument 1B of a fourth embodiment. As shown in FIG. 10(A), in the electronic musical instrument 1A, a cover 30A is attached to a touch panel 20. In FIG. 10(A), the touch panel 20 is covered by the cover 30A. The appearance of the cover 30A is in the second mode and is similar to the appearance of an outer member 5. As shown in FIG. 10(B), the cover 30A opens so that the touch panel 20 is exposed. In the third embodiment, the touch panel 20 is placed in the first mode when the cover 30A is opened, and is placed in the second mode when the cover 30A is closed.As shown in FIG. 11(A), in the electronic musical instrument 1B of the fourth embodiment, a touch panel 20 is covered by a cover 30B. As shown in FIG. 11(B), the cover 30B opens so that the touch panel 20 is exposed. Also in the fourth embodiment, the touch panel 20 is placed in the first mode when the cover 30B is opened, and is placed in the second mode when the cover 30B is closed.The configurations of the electronic musical instruments 1A and 1B of the third and fourth embodiments are also similar to those of the electronic musical instrument 1 of the first embodiment shown in FIG. 4. However, a changeover switch 110 of the electronic musical instrument 1A or 1B switches the appearance of the touch panel 20 between the first mode and the second mode by opening and closing the cover 30A or 30B.(2) Method for Opening / Closing the CoverFIGS. 12 to 15 are flowcharts showing opening / closing of the cover according to the third and fourth embodiments. Since the following description applies to both the third and fourth embodiments, the covers 30A and 30B are collectively referred to as the cover 30. The cover opening / closing method of Figs. 12 to 15 is carried out by the changeover switch 110 shown in Fig. 4. In step S 501 of FIG. 12, the changeover switch 110 determines whether an operation of turning on the power supply has been detected. In a case where an operation for turning on the power supply has been detected, the changeover switch 110 turns on the light of the touch panel 20 (step S 502), opens the cover 30 (step S 503), and starts the timer 109 (step S 504).In a case where the operation of turning on the power supply has not been detected in step S 501, the changeover switch 110 determines whether the operation of turning off the power supply has been detected in step S 505. In a case where the operation of turning off the power supply has been detected, the changeover switch 110 turns off the light of the touch panel 20 (step S 506) and stops the timer 109 (step S 507). Further, the changeover switch 110 closes the cover 30 (step S508) and stops the work in execution (step S509).In a case where the operation of turning off the power supply has not been detected in step S 505, the changeover switch 110 determines whether the timer 109 is active and whether the elapsed time period measured by the timer 109 has exceeded a predetermined time period (step S 510). In a case where the predetermined period of time has elapsed, the changeover switch 110 closes the cover 30 (step S 511) and stops the timer 109 (step S 512). In step S 510, in a case where the timer 109 is not active or in a case where the timer is active but the predetermined period of time has not elapsed, the process proceeds to step S 601 of FIG. 13.In step S 601 of FIG. 13, the changeover switch 110 determines whether a start of execution of a predetermined function has been detected. In a case where a start of execution of a predetermined function has been detected, the changeover switch 110 stops the timer 109 (step S 602). In a case where the cover 30 is closed, the changeover switch 110 opens the cover (step S 603) and sets an execution flag to an ON state (step S 604). In step S 601, in a case where a start of execution of a predetermined function has not been detected, the changeover switch 110 determines whether an end of execution of a predetermined function has been detected (step S 605). In a case where an end of execution of a predetermined function has been detected, the changeover switch 110 starts the timer 109 (step S 606) and sets an execution flag to an OFF state (step S 607). In step S 605, in a case where an end of execution of a predetermined function has not been detected, the process proceeds to step S 702 of FIG. 14.In step S 701 of FIG. 14, the changeover switch 110 determines whether an operation of opening the cover 30 has been detected. In a case where an operation of opening the cover 30 has been detected, the changeover switch 110 opens the cover 30 (step S 702), and starts the timer 109 (step S 703). For example, the player depresses a predetermined portion of the cover 30, the changeover switch 110 detects an opening operation. The cover 30 includes a driver (not shown) and performs an opening / closing operation by the control of the changeover switch 110. In a case where no operation for opening the cover 30 has been detected in step S 701, the changeover switch 110 determines whether a panel operation with respect to the touch panel 20 has been detected (step S 704). In a case where a panel operation has been detected, the changeover switch 110 determines whether an execution flag of a predetermined function is in the OFF state (step S 705). In a case where the execution flag is in the OFF state, the changeover switch 110 resets the timer 109 (step S706). After step S 705 or step S 706, the process performed by the changeover switch 110 proceeds to step S 801 of FIG. 15. Further, after step S 705 and step S706 executed by the switcher 110, the CPU 106 detects an operation position with respect to the touch panel 20 (step SB 1), and specifies a function or setting corresponding to the operation position (step SB 2). In a case where the specified function is executable, the CPU 106 executes the specified function. Alternatively, in a case where the specified setting is adjustable, the CPU 106 performs the specified setting (step SB 3).In step S 801 of FIG. 15, the switcher 110 determines whether a music performance sound is output. In a case where a music performance sound is output, the changeover switch 110 determines whether an execution flag of a predetermined function is in the OFF state (step S 802). In a case where the execution flag is in the OFF state, the changeover switch 110 determines whether the cover 30 is opened (step S 803). In a case where the cover 30 is opened, the changeover switch 110 closes the cover 30 (step S 804) and stops the timer 109 (step S 805).(3) Effects of the third and fourth embodimentsIn the electronic musical instrument 1A or 1B of the third embodiment, the cover 30A or 30B closes so that the touch panel 20 has a visually pleasing appearance in which the touch panel 20 fuses to the exterior member 5 of the electronic musical instrument 1. The player can operate the electronic musical instrument 1A or 1B while having a feeling similar to the feeling of playing an acoustic piano.Correspondences between constituent elements in claims and parts in preferred embodimentsIn the following paragraphs, non-limiting examples of correspondences between various elements recited in the following claims and the elements described above with respect to various preferred embodiments of the present disclosure are explained.In the above-mentioned embodiment, detection of an operation with respect to the touch panel 20 or execution of a certain function is an example of a first condition. In the above-mentioned embodiment, the reproduction of demonstration of music performance, recording, etc. are examples of the predetermined function. The first mode is an example of a first appearance mode, and the second mode is an example of a second appearance mode. The appearance of the touch panel 20 in the first mode is an example of a first visual appearance, and the appearance of the touch panel 20 in the second mode is an example of a second visual appearance.Characteristics of EmbodimentsThe display device for a musical instrument of the above-mentioned embodiments of the present disclosure includes the following characteristics.A display device for a musical instrument according to an aspect of the present disclosure includes a touch panel and a changeover switch that switches a visual appearance of the touch panel between a first appearance mode and a second appearance mode, the touch panel operating in both the first appearance mode and the second appearance mode, such that in a case where the touch panel is in the first appearance mode, the touch panel has a first visual appearance, and in a case where the touch panel is in the second appearance mode, the touch panel has a second visual appearance different from the first visual appearance, wherein, from the first visual appearance of the touch panel in the first appearance mode and the second visual appearance of the touch panel in the second appearance mode, the touch panel has a second visual appearance, the second visual appearance of the touch panel in the second appearance mode is similar to a visual appearance of a portion of the musical instrument disposed adjacent to the touch panel than the first visual appearance of the touch panel in the first appearance mode.The changeover switch may switch the visual appearance of the touch panel from the second appearance mode to the first appearance mode in a case where a first condition is satisfied, the first condition including detection of an operation with respect to the touch panel.The first condition may include execution of a predetermined function in the musical instrument.The changeover switch may switch the visual appearance of the touch panel from the first appearance mode to the second appearance mode in a case where the first condition remains unsatisfered for a predetermined period of time.The changeover switch may cause the touch panel to be operated in the second appearance mode during a period in which the musical instrument performs music performance.The switcher may change a lighting mode of the touch panel between the first appearance mode and the second appearance mode.The switcher may include a polarizer included in the touch panel, and the visual appearance of the touch panel may switch between the first and second appearance modes depending on a position of a viewer.The touch panel may display information that may be displayed to an information presentation subject in the first appearance mode.The portion of the musical instrument that is disposed adjacent to the touch panel may be an outer member of the musical instrument.A size of a field for displaying information on the touch panel may be reduced for the second appearance mode compared to the first appearance mode.A degree of correlation between a color of the touch panel and a color of the portion of the musical instrument disposed adjacent to the touch panel in the second appearance mode is higher than the degree of correlation between the color of the touch panel and the color of the portion of the musical instrument disposed adjacent to the touch panel in the first appearance mode.A degree of correlation between a pattern of the touch panel and a pattern of the portion of the musical instrument disposed adjacent to the touch panel in the second appearance mode may be higher than the degree of correlation between the pattern of the touch panel and the pattern of the portion of the musical instrument disposed adjacent to the touch panel in the first appearance mode.The pattern of the touch panel may be a wood pattern in the second appearance mode.While preferred embodiments of the present disclosure have been described above, it should be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is, therefore, to be determined solely by the following claims.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedJP 2006-146701 A

[0003]

Claims

A display device for a musical instrument, comprising: a touch panel including luminaires disposed in spaces separated from each other by a plurality of ribs, and a sheet provided above the luminaires; and a changeover switch that switches a visual appearance of the touch panel between a first appearance mode and a second appearance mode, wherein the touch panel operates in both the first appearance mode and the second appearance mode, such that in a case where the touch panel is in the first appearance mode, the touch panel has a first visual appearance, and in a case where the touch panel is in the second appearance mode, the touch panel has a second visual appearance different from the first visual appearance, wherein, In the first appearance mode, the touch panel in the second appearance mode has a second visual appearance similar to a visual appearance of a portion of the musical instrument disposed adjacent to the touch panel than the first visual appearance of the touch panel in the first appearance mode and the second visual appearance of the touch panel in the second appearance mode, the touch panel displays information separated from each other by the ribs and capable of being displayed to an information presentation subject in the first appearance mode by turning on the light of the lamps, and the visual appearance of the touch panel assumes the second visual appearance when the lamps are not illuminated.The display device for a musical instrument according to claim 1, wherein the changeover switch switches the visual appearance of the touch panel from the second appearance mode to the first appearance mode in a case where a first condition is satisfied, the first condition including detection of an operation with respect to the touch panel.The display device for a musical instrument according to claim 2, wherein the first condition includes execution of a predetermined function in the musical instrument.The display device for a musical instrument according to claim 2 or 3, wherein the changeover switch switches the visual appearance of the touch panel from the first appearance mode to the second appearance mode in a case where the first condition remains unsatisfered for a predetermined period of time.The display device for a musical instrument according to any one of claims 1 to 4, wherein the changeover switch causes the touch panel to be operated in the second appearance mode during a period in which the musical instrument performs music performance.The display device for a musical instrument according to claim 1, wherein the changeover switch includes a polarizer included in the touch panel, and switches the visual appearance of the touch panel between the first and second appearance modes depending on a position of a viewer.The display device for a musical instrument according to claim 1, wherein the portion of the musical instrument that is disposed adjacent to the touch panel is an outer member of the musical instrument.The display device for a musical instrument according to claim 1, wherein a size of a field for displaying information on the touch panel is reduced for the second appearance mode compared to the first appearance mode.The display device for a musical instrument according to claim 1, wherein a degree of correlation between a color of the touch panel and a color of the portion of the musical instrument disposed adjacent to the touch panel in the second appearance mode is higher than the degree of correlation between the color of the touch panel and the color of the portion of the musical instrument disposed adjacent to the touch panel in the first appearance mode.The display device for a musical instrument according to claim 1, wherein a degree of correlation between a pattern of the touch panel and a pattern of the portion of the musical instrument disposed adjacent to the touch panel in the second appearance mode is higher than the degree of correlation between the pattern of the touch panel and the pattern of the portion of the musical instrument disposed adjacent to the touch panel in the first appearance mode.The display device for a musical instrument according to claim 10, wherein the pattern of the touch panel in the second appearance mode is a wood pattern.The display device for a musical instrument according to any one of claims 1 to 11, wherein the information is formed by open portions in the sheet.The display device for a musical instrument according to any one of claims 1 to 12, wherein the luminaires are backlights.The display device for a musical instrument according to claim 13, wherein the backlights are LEDs.

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